21696130 has 16 divisors (see below), whose sum is σ = 40751424. Its totient is φ = 8301040.

The previous prime is 21696127. The next prime is 21696137. The reversal of 21696130 is 3169612.

It is not an unprimeable number, because it can be changed into a prime (21696137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46936 + ... + 47395.

It is an arithmetic number, because the mean of its divisors is an integer number (2546964).

Almost surely, 2^21696130 is an apocalyptic number.

21696130 is a deficient number, since it is larger than the sum of its proper divisors (19055294).

21696130 is a wasteful number, since it uses less digits than its factorization.

21696130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94361.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 21696130 is about 4657.9104757391. The cubic root of 21696130 is about 278.9078630169.

The spelling of 21696130 in words is "twenty-one million, six hundred ninety-six thousand, one hundred thirty".